[Vol 9 



268 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



T. sagittatum Heller, Bull. Torr. Bot. Club 25: 2G5. 1898; 

 Piper, Contr. U. S. Nat. Herb. 11: 298. 1906; Frye & Rigg, 

 Northwest Fl. 179. 1912. 



T. torulosum Heller, Bull. Torr. Bot. Club 25: 265. 189S; 

 Nelson in Coulter & Nelson, Manual Cent. Rocky Mountains. 

 210. 1909; Frye & Rigg, Northwest Fl. 179. 1912; Garrett, 

 Spring Fl. Wasatch Region, 48. 1912; Armstrong, Field Book 

 Western Wild Flowers, 176, fig. 1915. 



T. paniculatum A. Nelson, Bull. Torr. Bot. Club 26 : 1 26. 1 

 Rydb. Fl. Colo. 167. 1900; Nelson in Coulter <fc Nelson, Manual 

 Cent. Rocky Mountains, 210. 1909; Daniels, Fl. Boulder, Colo. 

 135. 1911. 



T. macro petalwn Rydb. Bull. Torr. Bot. Club 29: 233. 1902; 

 Rydb. Fl. Rocky Mountains, 367. 1917. 



Biennial or short-lived perennial, glaucous, glabrous or sparsely 

 hirsute near the base: stems usually branched from the base as 

 well as upwards, erect or ascending, 3-7 dm. high: radical and 

 lowermost cauline leaves entire, oblanceolate, 4-12 cm. long; 

 stem-leaves ovate-lanceolate or narrower, auriculate at the base 

 with broad lobes, usually acute: sepals purplish with scarious 

 margins, not saccate at the base, somewhat unequal, 5-7 mm. 

 long; petals white to deep purple, 2-3 times as long as the sepals, 

 blade oblanceolate, gradually narrowed to the slender claw which 

 nearly equals it in length; filaments 4-7 mm. long, anthers apic- 

 ulate, about 2 mm. long: inflorescence corymbose, elongating 

 and racemose when mature; pedicels divergent-ascending, nearly 

 straight, enlarged at the apex, 5-12 mm. long: pods erect or 

 strongly ascending, slender, frequently somewhat torulose, sub- 

 sessile, 3-6 cm. long; style 1-1.5 mm. long, stigma entire: seeds 

 irregularly angled, cotyledons obliquely accumbent. 



Distribution: southwestern Wyoming, northern Colorado, 

 southern Idaho, Utah, and northern Nevada. Type: Wyeth 

 "on the banks of the Little Goddin River towards the sources 

 of the Columbia." This is now known as the Little Lost River of 

 Idaho. 



Specimens examined: 



Wyoming: Wheatland, June 18, 1891, Nelson 58 (Rky. Mt. 

 Herb.); saline flats, Kemmerer, June 13, 1900, Nelson 7164 

 (Rky. Mt. Herb.) ; Fossil, June 12, 1898, Nelson 4673 (Rky. Mt. 

 Herb, and Mo. Bot. Gard. Herb.); Evanston, May 29, 1897, 

 Nelson 8013 (Rky. Mt. Herb.) ; Evanston, June 5, 1898, Nelson 

 4545 (Rky. Mt. Herb.). 



